Lamp filament and support



May 29 1923. 1,457,239

A. s. VOLPIAN LAMP FILAMENT AND SUPPORT Filed Ogt. 25 1921 WITNESSES l/WE/V T0]? A5. VoLp/AN By Y A TTOR/VE VS Patented May 29, i923.

NlTED S'FTS ama aria.

PATNT LAMP FILAMENT AND SUPPORT.

Application filed October 25, 1921.

To all whom it may concern:

Be it known that l, ALEXANDER S. VOL- PIAN, a citizen of the United States, and a resident of Savannah, in the county of Chatham and State of Georgia, have invented a new and Improved Lamp Filament and Support, of which the following is a descri tion.

y invention relates to a filament and support therefor for incandescent electric lamps.

The invention has for its general ob ect to provide a filament and separated supporting elements therefor with which the filament has contact at various points so that should the filament break or current be otherwise interrupted at one point in the total length of the filament, the remainder of the filament will be continued in circuit with the supporting elements and illumination be maintained.

A more specific object of the invention is i to provide a support for the filament of a character to prevent sh'ort-circuiting, as well as to provide strength.

The nature of the invention and its distinguishing features and characteristics will more clearly appear as the description proceeds. I

Reference is to be had to the accompanying drawing forming a part of this specification, in which the figure is a perspective view of a filament and support constituting an embodiment of my invention, it being understood that the drawing is merely illustrative of one example of the invention.

In carrying out my invention in accord unce with the illustrated example, I provide a stem 10 forked at its outer end as at 10, the fork carrying a frame 11 preferably of ring form. A second stem 12 is provided, extending lengthwise of the stem 10 and forked at its outer end as at 12, the fork carrying a frame 13 advantageously of ring form and smaller than the frame 11.

A film 14 runs back and forth between the frames 11 and 13 laced about the latter or Otherwise making an efiective electrical contact therewith.

It will be clear that should the filament be broken or interrupted at a given point or points, the circuit will be completed through the remainder of the filament.

The stems 10 and 12 are separated throughout their len hs to prevent short circuiting. lt'will e readily understood Serial No. 510,874.

that the terminals of the stems 10 and 12 are insulated in the lamp plug in the usual manner.

1 would state in conclusion that while the illustrated example constitutes a practical embodiment of my invention, 1 do not limit myself strictly to the exact details herein illustrated, since, manifestly the same can be considerably varied without departure from the spirit of the invention as defined in the appended claims.

Having thus described my invention, I claim:

1. A filament support having two ringlike frames one within the other, and both disposed in a plane transverse to the longitudinal axis of the lamp enclosing said frame, and a filament running back and forth between said frames and alternately making contact with the respective frames.

2. A filament support including separate stems having forked outer ends, separated rings carried by the forks, and a filament running back and forth across the space between the frames, and contacting with the rings at separate points.

3. An incandescent lamp having separated filament supporting elements presenting separated frames, in the form of concentric rings, and filament members extending across the space between said frames at intervals and in contact therewith to form electrical connections between the frames at different points about the same, in a plane parallel with the plane of the radii of the rings.

4:; A filament support comprising a frame presenting a plurality of concentric rings each connected to an electrical terminal, and a filament. running back and forth between said rings and in contact alternately and at spaced points therewith.

5.,A. filament support comprising a pair of bifurcated frames each connected to the electrical terminals of a lamp, and each carrying adjacent their free ends a ring, and a filament running from one ring to the other at spaced points therewith.

6. In a filament support of the class described. a frame presenting a pair of ring one concentric with the other and substantially in the same plane, each ring being connected to one electrical terminal of a lamp,

and a filament running back and forth be-l tween said rings and connected thereto. 

